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authorLuca Boccassi <luca.boccassi@gmail.com>2018-11-19 12:59:01 +0000
committerLuca Boccassi <luca.boccassi@gmail.com>2018-11-19 12:59:24 +0000
commit29058550643267a554e0368806dece63b047c5cb (patch)
treea6f573fe3fbc14585529b83cfcc65da2dceefbf5 /drivers/bus/pci/linux/pci_vfio.c
parent8a853e3f0275efc8b05cb195085d45946942744a (diff)
New upstream version 18.11-rc4upstream/18.11-rc4
Change-Id: I861e1a2f7df210f57f44f1ad56b9ef789a4675e3 Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Diffstat (limited to 'drivers/bus/pci/linux/pci_vfio.c')
-rw-r--r--drivers/bus/pci/linux/pci_vfio.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/bus/pci/linux/pci_vfio.c b/drivers/bus/pci/linux/pci_vfio.c
index 305cc060..ffd26f19 100644
--- a/drivers/bus/pci/linux/pci_vfio.c
+++ b/drivers/bus/pci/linux/pci_vfio.c
@@ -19,6 +19,7 @@
#include <rte_vfio.h>
#include <rte_eal.h>
#include <rte_bus.h>
+#include <rte_spinlock.h>
#include "eal_filesystem.h"
@@ -282,6 +283,14 @@ pci_vfio_setup_interrupts(struct rte_pci_device *dev, int vfio_dev_fd)
}
#ifdef HAVE_VFIO_DEV_REQ_INTERFACE
+/*
+ * Spinlock for device hot-unplug failure handling.
+ * If it tries to access bus or device, such as handle sigbus on bus
+ * or handle memory failure for device, just need to use this lock.
+ * It could protect the bus and the device to avoid race condition.
+ */
+static rte_spinlock_t failure_handle_lock = RTE_SPINLOCK_INITIALIZER;
+
static void
pci_vfio_req_handler(void *param)
{
@@ -289,11 +298,12 @@ pci_vfio_req_handler(void *param)
int ret;
struct rte_device *device = (struct rte_device *)param;
+ rte_spinlock_lock(&failure_handle_lock);
bus = rte_bus_find_by_device(device);
if (bus == NULL) {
RTE_LOG(ERR, EAL, "Cannot find bus for device (%s)\n",
device->name);
- return;
+ goto handle_end;
}
/*
@@ -306,6 +316,8 @@ pci_vfio_req_handler(void *param)
RTE_LOG(ERR, EAL,
"Can not handle hot-unplug for device (%s)\n",
device->name);
+handle_end:
+ rte_spinlock_unlock(&failure_handle_lock);
}
/* enable notifier (only enable req now) */